Rovio has just announced its calendar 2011 financial results, and according to Reuters, the studio is also preparing itself for an IPO. Yearly revenue totaled €75.4 million (around $106.3 million), generating €48 million ($67.6 million) in pre-tax profit. It's worth remembering that sales of Rovio's record-breaking Angry Birds Space aren't included here, as it was released in 2012. Its 2011 lineup, which consisted of Angry Birds, Angry Birds Seasons, and movie tie-in Angry Birds Rio, drove the total number of game downloads up to 648 million by the end of the financial year, with active monthly users reaching 200 million. But it's not just the games that are keeping the money flowing — Rovio says that around 30 percent of its total revenue was generated by merchandising and licensing.

This is the first year that Rovio has released detailed financials, but revenue for 2010 was said in the region of $10 million, less than 10 percent of the revenue earned this year. Reuters reports that Anders Lindeberg, Rovio's head of investor relations, confirmed that the company is "preparing itself and getting ready" for a stock market listing. Rovio CEO Mikael Hed was understandably bullish about the company's future prospects, saying the company was "optimistic about 2012 due to significant investments in product development, cutting-edge branding, brand protection and corporate infrastructure."